{"id":"CVE-2026-116539","revision":"9302b8e35c134ac2a8304891748e3116","records":[{"revision":"9302b8e35c134ac2a8304891748e3116","observedAt":"2026-10-26T16:35:30.797+00:00","statement":{"source":"cve-program","id":"CVE-2026-116539","aliases":[],"title":"Netty netty-tcnative before 2.0.84.Final Heap Buffer Overflow via OpenSSL BIO","description":"Netty netty-tcnative before 2.0.84.Final contains a heap buffer overflow vulnerability in the tcn_write_to_bytebuffer BIO callback caused by failing to wrap the non-application ring buffer write index. Remote TLS peers can drive handshake, renegotiation, or post-handshake messages into this buffer, triggering an out-of-bounds memcpy that crashes the JVM process.","state":0,"publishedAt":"2026-10-26T14:59:39.46+00:00","modifiedAt":"2026-10-26T14:59:39.46+00:00","affected":[{"ecosystem":"https://repo1.maven.org/maven2/io/netty/netty-tcnative/","name":"io.netty:netty-tcnative","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"vendor\": \"netty\",\n                    \"product\": \"netty-tcnative\",\n                    \"collectionURL\": \"https://repo1.maven.org/maven2/io/netty/netty-tcnative/\",\n                    \"packageName\": \"io.netty:netty-tcnative\",\n                    \"repo\": \"https://github.com/netty/netty-tcnative\",\n                    \"defaultStatus\": \"unaffected\",\n                    \"packageURL\": \"pkg:maven/io.netty/netty-tcnative\",\n                    \"versions\": [\n                        {\n                            \"version\": \"0\",\n                            \"lessThan\": \"2.0.84.Final\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"custom\"\n                        }\n                    ]\n                }"},{"ecosystem":"https://repo1.maven.org/maven2/io/netty/netty-tcnative-boringssl-static/","name":"io.netty:netty-tcnative-boringssl-static","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"vendor\": \"netty\",\n                    \"product\": \"netty-tcnative-boringssl-static\",\n                    \"collectionURL\": \"https://repo1.maven.org/maven2/io/netty/netty-tcnative-boringssl-static/\",\n                    \"packageName\": \"io.netty:netty-tcnative-boringssl-static\",\n                    \"repo\": \"https://github.com/netty/netty-tcnative\",\n                    \"defaultStatus\": \"unaffected\",\n                    \"packageURL\": \"pkg:maven/io.netty/netty-tcnative-boringssl-static\",\n                    \"versions\": [\n                        {\n                            \"version\": \"0\",\n                            \"lessThan\": \"2.0.84.Final\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"custom\"\n                        }\n                    ]\n                }"}],"metrics":[{"system":"CVSS 4.0","vector":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N","score":8.2,"severity":"HIGH"},{"system":"CVSS 3.1","vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H","score":5.9,"severity":"MEDIUM"}],"references":["https://github.com/netty/netty-tcnative/security/advisories/GHSA-gf9q-9mg7-g5qh","https://github.com/netty/netty-tcnative/commit/92dd66fd1243d85c05a61288f96367a70260b6b8","https://github.com/netty/netty-tcnative/blob/netty-tcnative-parent-2.0.83.Final/openssl-dynamic/src/main/c/ssl.c#L199","https://github.com/netty/netty-tcnative/releases/tag/netty-tcnative-parent-2.0.84.Final","https://github.com/netty/netty-tcnative","https://www.vulncheck.com/advisories/netty-netty-tcnative-before-2.0.84-final-heap-buffer-overflow-via-openssl-bio"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-116539","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-116539","identifiers":["CVE-2026-116539"]},"retained":false,"historicalAffected":[]}],"coverage":[]}